Which is not typically a principal warfighting function?

The correct response highlights that defensive operations are not classified as a principal warfighting function in the same way as intelligence, sustainment, or movement and maneuver. The principal warfighting functions serve as the core components that provide the framework for conducting military operations. These are ongoing practices essential for mission success.

Intelligence enables commanders to make informed decisions based on the enemy's capabilities, terrain, and other factors. Sustainment focuses on ensuring that troops have the necessary supplies and resources to maintain operations over time. Movement and maneuver involve the deployment and positioning of forces to achieve operational objectives effectively.

Defensive operations, while crucial in a comprehensive military strategy, are more of a tactical approach rather than a fundamental warfighting function. They are typically integrated within the broader context of these principal functions rather than constituting a standalone category. Thus, identifying defensive operations as separate signifies an understanding of how military operations are structured and executed in support of overarching objectives.